The Nike Free Trainer 5.0 V6 AMP USC Team Crimson/White/University Gold of Men's Nike Training Shoe features hexagonal flex grooves and rubber pods in high-wear areas for an incredibly natural feel and durability where it counts. Lightweight Flywire cables integrate with the laces to lock down the foot and give you an adaptive fit during multi-sport workouts.FLEXIBLE STRENGTH. DYNAMIC FIT.Benefits Lightweight mesh upper offers excellent ventilation No-sew overlays throughout provide support and durability without added weight Flywire technology integrates with the laces for dynamic support and lockdown Low-profile Phylite midsole provides a resilient ride and is durable enough to double as an outsole Hexagonal flex grooves allow for natural range of motion Waffle outsole pistons work with the Phylite midsole to help absorb impactProduct Details Minimal, molded sockliner mimics the curvature of the foot for enhanced support Rubber pods in the heel and toe offer durability in high-wear areas 3/4-length bootie wraps the foot for a seamless fit Anatomical heel is rounded to roll with the groundNike Free OriginsAfter learning that Stanford athletes had been training barefoot on the university's golf course, three of Nike's most innovative and creative employees set out to develop a shoe that felt natural and weightless, similar to bare feet. In 2002, they examined a group of men and women with pressure measuring insoles taped to their feet, using high-speed cameras to capture images of each foot in motion.The team spent eight years studying the biomechanics of shoeless running. The results yielded a profound understanding of the foot's natural landing angle, pressure and toe position, allowing Nike designers to build an unconventional and flexible running shoe from the inside out....The Nike Shoes more colors